C # Sending data from Socket asynchronous communication Client

C # Main program of Socket asynchronous communication client: [c-sharp] # public static int Main (String [] args) # {## IPAddress ipAddress = IPAddress. parse ("192.168.1.104"); # int port = 20000; # IPEndPoint remoteEP = new IPEndPoint (ipAddress, port); ###// generate a TCP/IP socket. # Socket client = new Socket (AddressFamily. interNetwork, # SocketType. stream, ProtocolType. tcp); # // connect to the target terminal. # client. beginConnect (remoteEP, # new AsyncCallback (ConnectCallback), client); # // wait until the Connection Program is complete. ConnecDone is available in ConnectCallback. set () Statement # connectDone. waitOne (); ##// send data to a remote terminal. # Send (client, "This is a test <EOF>"); # sendDone. waitOne (); ##// receives the returned data. # Receive (client); # receiveDone. waitOne (); ##// Write the response to the console. # Console. writeLine ("Response received ed: {0}", response); ## // Release the socket. # client. shutdown (SocketShutdown. both); # client. close () ;## return 0; # C # connection part of the Socket asynchronous communication client Callback: [c-sharp] 1. private static void ConnectCallback (IAsyncResult ar) 2. {3. 4. // obtain the socket from the state object. 5. socket client = (Socket) ar. asyncState; 6. 7. // complete the connection. 8. client. endConnect (ar); 9. 10. console. writeLine ("Socket connected to {0}", 11. client. remoteEndPoint. toString (); 12. 13. // The connection is complete and the main thread continues. 14. connectDone. set (); 15 .} C # Socket asynchronous communication client: [c-sharp] # private static void Receive (Socket client) # {## // construct the container state. # StateObject state = new StateObject (); # state. workSocket = client; ##// receives data from a remote target. # client. beginReceive (state. buffer, 0, StateObject. bufferSize, 0, # new AsyncCallback (effececallback), state); ##}# private static void effececallback (IAsyncResult ar) #{## // obtain the state and socket object from the asynchronous state object of the input parameter # StateObject state = (StateObject) ar. asyncState; # Socket client = state. workSocket; ## // read data from a remote device # int bytesRead = client. endReceive (ar) ;## if (bytesRead> 0) #{# // data is stored. # state. sb. append (Encoding. ASCII. getString (state. buffer, 0, bytesRead); ##// continue reading. # client. beginReceive (state. buffer, 0, StateObject. bufferSize, 0, # new AsyncCallback (effececallback), state) ;#}# else #{# // all data has been read. # if (state. sb. length> 1) # {# response = state. sb. toString () ;#}# // indicator signal indicating that all data has been read. # receiveDone. set () ;#}#}www.2cto. comC # send data from Socket asynchronous communication client: [c-sharp] view plaincopy www.2cto.com 1. private static void Send (Socket client, String data) 2. {3. // format conversion. 4. byte [] byteData = Encoding. ASCII. getBytes (data); 5. 6. // start sending data to a remote device. 7. client. beginSend (byteData, 0, byteData. length, 0, 8. new AsyncCallback (SendCallback), client); 9 .} 10. 11. private static void SendCallback (IAsyncResult ar) 12. {13. 14. // obtain socket 15 from the state object. socket client = (Socket) ar. asyncState; 16. 17. // complete data transmission. 18. int bytesSent = client. endSend (ar); 19. console. writeLine ("Sent {0} bytes to server. ", bytesSent); 20. 21. // indicates that the data has been sent and the main thread continues. 22. sendDone. set (); 23. 24 .}